Examining table leg rest



Sept. 15, 1931.

H. Sv ALLISON EXAMINING TABLE LEG REST Original Filed April 30. 1927 wWM 50 21 QU- N W W Patented Sept. 15,. 1931 UNITED-STATES PATENT()FFICIE HARRY S. ALLISON, OF INDIANAPOLIS, INDIANA, ASSIGNOR T W. D.ALLISGN COM- PANY, 0F INDIANAPOLIS, INDIANA, A CORPORATION 3F INDIANAIEXAIMIN'ING TABLE LEG Original applicationfiled April 30, 1927, SerialNo. 185,132. Divided and this application filed February 24, 1930.Serial 110.430,?88.

This invention is a division from my application for patent filed April30, 1927, Serial N 0. 185,132, and relates to an adjustable legrestcadapted to be employed in conjunction with examining tables and thelike.

'An' object of the invention resides in the provision of a mechanismproviding for the rocking of a foot rest attached tothe leg rest from anangular position with the leg rest to a position in substantially thesame plane therewith and extended therefrom automatically' upon swingingthe leg rest toward a horizontal position.

Other objects reside in the particular method of mounting the leg restand in the mechanism permitting the maintenance 0 the leg rest atselective positions.

These and other objects will become apparent in the followingdescription of the inven-- 1 tionas illustrated by the accompanyingdrawings, in which.

Fig. 1 is aside elevation of an end of a table with my inventionappliedthereto; and

Fig. 2, a vertical section on the .line 2-2 in Fig. 1; I V I 'Likecharacters of reference indicate like parts in the two views in thedrawings.

To the end of a table 10,1 hingedly attach aleg rest 11 by means of thehinge brackets 12 and 13 secured in spaced apart relation along theunder or back side of the rest 11 so that the rest may normally hangdownward and be swung around to a horizontal plane.

A' foot rest 14 ishingejd to the leg rest 11' at its lower end, and apair of arms 15 and 16 extend rearwardly from the under SlflG' of thefoot' rest to have their rear ends pivotally engage the lower ends ofthe bars 17 and 18 which, in turn, are pivotally secured by their upperends to the table at points spaced below the hinge brackets 12 and 13.The spacing of the pivoted upper ends of the bars and the length of thearms and 16 are made such that, upon swinging the leg rest 11 out awayfrom its vertical depending position toward'the horizontal position,thebars 17 and 18 will pull on the arms 15 and 16 to rock the foot rest14 around to extend from the leg rest and approach a position in thesame plane with the leg rest.

Now, to hold the leg rest 11 out from the table at the horizontal orintermediate positions as may be desired, I rockably attach the rackbars 19 and 20 by their upper ends to the table end on the same pins 21and 22 as.

hold the bars 17 and 18 and pass the rack bars down slidingly throughthe brackets 23 and 24 which are secured to the back side of the legrest at points spaced downwardly from the upper hinged end. These rackbars 19 and 20 have their lower ends curved rearwardly and are notchedon their forward sides to provide a plurality of projecting teeth 25.The two brackets 23 and 24, being in the same horizontal plane, supportthereacross therock shaft 26 which is provided with convenient handles27 and 28 on its ends to project along the sides of the leg rest 11. Therock shaft 26 carries the pawls 29 and 30 over each bracket 23 and 24and in front of the respective rack bars 19 and 20 to engage against thelower faces of 'the teeth 25. Preferably, springs 31 bear against thefor- Ward sides of the pawls to hold them yield- 1 ingly against therack bars.

When the leg rest 11 is swung away from the vertical position, the rackbars 19 and 20 slip through the brackets 23 and 24 and the pawls 29 and30 pressing thereagainst drop consecutively behind each of the teeth asmay travel therepast until the leg rest is released whereupon the pawls,contacting the teeth, prevent downward and backward swing of the rest 11until the pawls are rocked out of engagement with the teeth by rockingeither handle 27 or 28 as may be convenient. c

The hinge brackets 12 and 13 are preferably hinged on plates 32 whichcarry the pins 21 and 22 so that the leg-rest and its attendant partsmay be assembled as a unit before attaching to the table.

I claim:

1; The combination with a table, of a leg rest hinged to the table, afoot rest hinged to the leg rest, an arm fixed to the foot rest andextending toward the table, a bar pivotally attached to the arm and tothe table, a rack bar hinged by its upper end to the table and slidablyattached to the leg rest and otherwise unattached, a pawl automaticallyengaging the rackbar to maintain the leg rest at selective positionsandmanually operated'means for releasing the bar from the pawl.

2. The combination with a table of a leg rest hinged to the table, afoot rest hinged to the leg rest, an arm fixed to the foot rest, a barpivotally attached to the arm and to the table,

a rack bar hinged at its upper end to the table and having its lower endcurved away from the leg rest and having teeth on its edge I toward theleg rest, a bracket on theleg rest having an opening through which thecurved end of the rack bar passes, a pawl normally contacting the bar inthe path of the teeth,

and means for manually disengaging the pawl from the bar teeth. I

In testimony whereof I aflix my signature.

HARRY s. ALLISON.

